Go by Example 中文：非阻塞通道操作
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常规的通过通道发送和接收数据是阻塞的。然而，我们可以使用带一个 |
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package main
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import "fmt"
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func main() {
messages := make(chan string)
signals := make(chan bool)
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这里是一个非阻塞接收的例子。如果在 |
select {
case msg := <-messages:
fmt.Println("received message", msg)
default:
fmt.Println("no message received")
}
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一个非阻塞发送的实现方法和上面一样。 |
msg := "hi"
select {
case messages <- msg:
fmt.Println("sent message", msg)
default:
fmt.Println("no message sent")
}
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我们可以在 |
select {
case msg := <-messages:
fmt.Println("received message", msg)
case sig := <-signals:
fmt.Println("received signal", sig)
default:
fmt.Println("no activity")
}
}
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$ go run non-blocking-channel-operations.go
no message received
no message sent
no activity
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下一个例子: 通道的关闭.